I am not able to log in with those credentials.
1. If the Add Listing page redirects to the home page, that is usually because users are not allowed to add listings, review GD > Design > Navigation
https://wpgeodirectory.com/docs/core-design/#navigation
2. Listing preview and success and info pages will only work when a listing is submitted from the frontend. Those pages are never meant to be accessed directly.
https://wpgeodirectory.com/docs/layout/#manage
3. Login page only redirects to frontpage if you are already logged in.
4. Location page will show whatever widgets you added to GD Home sections, see
https://wpgeodirectory.com/docs/layout/#directory
5. Invoice pages should only be accessed from the dashboard widget and not linked to direct.
6. Please check and post your admin details, and provide FTP details as well, then we will check things out.